Instrument



FIG. 1 is a front perspective view of an instrument showing our design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Throughout the figures, broken lines are boundaries that form no part of the claimed design. 

CLAIM The ornamental design for an instrument, as shown and described. 